●Sizes indicate INSIDE strap wide opening / Pack of 10 pieces ●Interior Hight x Width for Size 1-1/4 Inches = 11/16" x 1-1/4" (17 x 32 mm) ●Interior Hight x Width for Size 1-1/2 Inches = 3/4" x 1-1/2" (18 x 38mm) ●Wire thickness is approximately 3 mm (1/8 inch) ●See matching D Rings, search item B073ZF2WF8